Drink is served about ten by him (6)
I believe the answer is:
alexis
'him' is the definition.
'drink is served about ten' is the wordplay.
I cannot quite understand how this works, but
'drink' could be 'ale' (type of beer) and 'ale' is found in the answer.
'is' is present in the answer.
'ten' could be 'x' (Roman numeral) and 'x' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'by' is the link.
Can you help me to learn more?
(Other definitions for alexis that I've seen before include "man or woman" , "Lia's ex has another name" .)